Arcing horns protect bushings in case of the overvoltage.

**Problem Type:** 3D electrostatics.

**Geometry:** 3D import.

**Given:**

Relative permittivity of air ε_{0} = 1,

Relative permittivity of insulator ε_{r} = 6,

HV *V* = 6 kV (RMS).

**Task:**

Calculate electric field stress distribution along the bushing insulator surface and in the spark gap.

**Solution:**

**Results:**

Electric field distribution in the spark gap:

See the *arcing_horns.pbm* problem in the Examples folder.